Process of preparing paper for sun-pictures



UNITED STATES PATENT OFFICE.

JOSEPH S. SIMONDS, OF DETROIT, MICHIGAN.

PROCESS OF PREPARING PAPER FOR SUN-PICTURES.

EZPECIPICATION forming part of Letters Patent No. 347,527, dated August17, 1886.

Application filed September 10, 1885. Serial No. 176,753. (Nospecimens.)

The invention consists in the peculiar process of preparing such paper,as more fully hereinafter described.

I take any suitable colored paper, using a variety of colors, so thatany color which is designed to be most prominent in the comjury byrubbing.

pleted picture may be used. The papers used are preferably such as areknown as coverpapers, as the color in such .papers is uniform and thepapers themselves have the requisite body. These papers I cut into anyof the sizes required, and immerse the same in a solution having aboutthe consistency of cream, made by dissolving india-rubber in 63 gravitynaphtha. Then the paper is placed on a smooth and nearlyinflexiblematerial of the same size as thc'paper, or thereabout, such materialbeing of glass, pasteboard, &c., snfficicntl y stiff to hold the paperinposition when placed in the camera without buckling or wrinkling, afterwhich the surface is rubbed down smoothly, tissue-paper or othersuitable material being placed over it to prevent in- If pasteboard oranything that will be attacked by acids is employed for the backing tothe paper, the back edges of such backing must be protected from suchchemical action by a coating of asphalt on the exposed surfaces. Afterdrying, remove the solution of rubber from the exposed face of thepaper, which can be done by a little fricof about the thickness ofcream, made by disu solving a certain quantity of pure rubber in 63gravity naphtha and a like quantity of pure gutta-percha dissolved inpure benzole; After this surface of film is dried I albumenize suchsurface with the pure white of an egg, or any such albumen which willadhere to the surface, gelatine itself not having such affinity to thesolution as to make it adhere. After this film of albumen has beenapplied, I surface the same with pure gelatine and chromealum, inthe-usual way. Now the paper is ready to be sensitized for photographing by any of the known dry or wet processes, the picture being takendirectly upon the pa per without the intervention of anegative.

If a sitter has auburn hair and a dress of a corresponding color, whichit is desired to reproduce in the picture, I select for use that colorof prepared paper that is nearest the shade ofthe hairand dress. Thepicture, when completed, will be sharp and clear, and will give thecolor of the hair and dress with great accuracy and success.

What I claim as my invention is The process herein described ofpreparing paper for photographic purposes by removing the solution ofrubber from the exposed face thereof, and coating the same with a filmcomposed of rubber dissolved in naphtha and gutta-percha dissolved inbenzole, albumenizing such surface with pure white of egg, and thenapplying to such surface pure gelatine and chrome-alum, substantially asand for the purposes set forth.

JOSEPH S. SIMONDS.

\Vitnesses:

H. S. SPRAGUE, EDMOND I. SoULLY.

